My system is not decent

Chapter 1665 Artificial Jade

A good glaze recipe requires hundreds of trials to succeed.

Most of them are handed down from master to apprentice or family, and they are kept secret.

With the glaze formula, technology is also required.

So the thick glaze decoration technology appeared, which is the method of multiple glazing.

The green body is dried, bisque-fired and glazed, and then dried, bisque-fired and glazed.

This is repeated three to four times, and finally fired into thick-glazed celadon as warm as jade.

Celadon decoration techniques also include engraving, scratching, printing, decals, picking, hollowing out, kneading, stacking, stippling, and exposed tires.

The last is the celadon firing technology. The firing process of Longquan celadon is divided into six stages: drying, oxidation, constant temperature, reduction, high-fire oxidation, and cooling.

Thick-glazed celadon is difficult to fire, and the temperature is too high or too low to achieve the jade-like effect.

Artists control the firing temperature, time and atmosphere with the help of thermometers, observation of flame color, and other years of accumulated experience.

Longquan celadon uses iron as the main coloring agent, and the basic color of the glaze is turquoise. The color is pure and the glaze is jade-like.

Longquan celadon is divided into two categories: Ge kiln and younger brother kiln. Ge kiln celadon has a black body, while younger brother kiln celadon has a white body and does not have a piece. The glaze color is pink green and plum green.

Skill practitioners mainly produce in family workshops and family inheritance, and family members are the technical backbone.

It is also because of this method of inheritance that the firing technology of Longquan celadon has never been passed down.

In addition, Chen Wenzhe has a heart, so after collecting these few pieces, he has a very good understanding of the modern Longquan kiln.

The modern Longquan kiln is still different from the ancient Longquan kiln, especially the kiln mouth and glaze.

The modern Longquan kiln is different from the ancient ones in terms of kiln reform, green glaze redevelopment, and firing technology.

There are even some contemporary celadon artists who have invented new technologies such as brother-brother kiln combination and film opening control.

Of course, Chen Wenzhe has not yet reached the stage of innovation, he is still in the stage of imitation and re-burning.

It's just that the Longquan kiln porcelain he imitated is the most classic standard vessel.

Really good Longquan celadon, warm and moist like jade, has the connotation of jade culture, and is known as the beautiful jade made by man.

In the ancient Chinese "Book of Songs", there is a saying that "speaking of a gentleman, warming him like jade", compares a virtuous person to jade.

The glaze color of Longquan celadon blends with the blue-green tone of nature, which is in line with the classical aesthetic ideal of "Tao follows nature".

Longquan celadon does not contain harmful substances such as lead and cadmium, and is fired into daily-use porcelain such as tableware, tea sets, and wine sets, which are used in daily life;
Exquisite craft porcelain, displayed in the home;

Elegant art porcelain is widely collected by museums and connoisseurs;

Up to now, even the Chinese government has presented Longquan celadon as a national gift to international friends.

Longquan celadon does not have very rich colors in terms of appearance and luster, but it has won the reputation of "green color of thousands of peaks" for its relatively single "green" color.

And how does a piece of Longquan celadon with excellent workmanship, beautiful shape and warm glaze color be fired?

First of all, it must be mud refining, which is a very critical point in the firing process of all porcelain, that is, the selection of raw materials;

Zijin soil is an indispensable raw material for firing Longquan celadon.

After getting the purple gold clay raw materials, it needs to be crushed, soaked and other processes before it can be formed into the mud for making Longquan celadon.

With the right mud, it is necessary to design the shape.

It's just that Chen Wenzhe didn't need to design the shape of the porcelain when he fired the standard wares.

The appearance of Longquan celadon needs to go through multiple steps such as embryo drawing, embryo trimming, and decoration.

Before drawing the embryo, it is necessary to knead the porcelain clay according to certain rules.

After it is uniform, it can be placed on the drawing machine.

Then use your feet to control the speed of the turntable, and use your hands to shape the porcelain clay.

After the embryo drawing is completed, the object needs to be dried, and then the embryo is trimmed and decorated.

The decoration methods of Longquan celadon mainly include engraving, stacking sculptures, carving, etc., and a small part of them are painted.

After the first production is completed, the biscuit firing will be carried out.

Ordinary porcelain is fired at one time.

However, Longquan celadon needs to be fired once after the modeling and decoration are completed, that is, the embryo body is put into the kiln and fired to 800-900 degrees to finalize the shape.

After bisque firing, the porcelain embryo needs to be glazed three times;
Every time the glaze is applied, it needs to wait for drying before the next glaze can be applied - the characteristic of Longquan celadon "thin body and thick glaze".

It is formed in this way, which is also a key step in the formation of "Qianfeng emerald color".

Traditional Longquan celadon is fired in a dragon kiln.

In modern times, the convenient and fast liquefied gas kiln is basically used for firing.

Put the glazed and dried porcelain into the kiln chamber, and turn off the fire when it is fired to about 1300 degrees.

Generally, continuous firing is required for more than ten hours. After the kiln temperature cools down, the firing of Longquan celadon can be regarded as completed.

Since the production of Longquan celadon requires three glazing and two firing processes, it is very difficult to fire;

In the past, when firing in dragon kiln, the finished product rate was only about 20.00% to [-]%.

At present, only [-]% to [-]% of finished products are fired in liquefied gas kiln.

After layers of experience, Longquan celadon has the charm of "when the rain is over and the clouds are broken, and the plums are sour and green".

Of course, Chen Wenzhe is firing in a retro way, recreating the ancient Longquan kiln firing process, so he will choose to use wood kiln this time.

However, firing in a firewood kiln is too much trouble.

Often, just after dawn every day, the work of the day will start.

Because it takes less than half a year to prepare for firing a kiln.

Of course, Chen Wenzhe didn't need to be so troublesome, because he didn't need to do many procedures in person.

In this way, with the cooperation of many people, he can speed up the firing of porcelain in the kiln.

When he was in South Vietnam, Chen Wenzhe had already done it very well.

This morning, Chen Wenzhe was sitting by the kiln, changing the knives in his hands, and trimming the billets meticulously.

The roulette spins, and along with the scraper, mud crumbs roll and fall on the countertop.

After a while, a piece of celadon clay was completed.

Next to the kiln, there are neatly stacked firewood and qualified purple gold soil after treatment.

After a few days of busy work, he has almost done what he should do. Chen Wenzhe is going to start the kiln to fire celadon today.

Now there are many people who like celadon, but how many people really understand Longquan celadon?
Just getting in touch with it, I want to know more about it, because the beauty of celadon is really intoxicating.

However, I don't really know much.

And if you want to understand, you have to start with the materials of celadon, the main ingredients are mud and glaze.

The mud is kaolin, the younger brother's kiln is white, and the elder brother's is cinnabar.

Porcelain with an iron body can literally be known to have a relatively high iron content, which is similar to that of Ge Kiln.

The firing process of iron tires is particularly difficult, and the yield is lower.

(End of this chapter)